I understand your concern but you really have no reason for that. We're talking about the electromagnetic radiation from you car's computer which is really no more than from a laptop or desk computer and that amount of radiation is not associated with pregnancy risks. Here's a link for you
What about the wiring and battery that are running through the car, I didn't think that would be considered the computer.
Still no problem--it's still electromagnetic radiation whether produced by a computer or by a battery and wiring and the amount produced in both is still not at a level to be considered placing you or your fetus/child at risk